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The last truck in the parade is hit by a train, a police spokesman says

A train rammed into a flatbed truck carrying participants in a West Texas parade saluting U.S. troops, killing four people and injuring several others, a police spokesman said.

The incident happened around 4:30 p.m. Thursday, during the "Hunt for Heroes" event in Midland. According to the group Show of Support, these festivities -- including a banquet and, after that, an "all expense paid whitetail deer hunt" -- are to honor members of all branches of the U.S. military.

The last flatbed truck in the parade was crossing tracks when an eastbound train slammed into it, said Midland police spokesman Ryan Stout.

Some people were able to jump off the truck in time.

First responders found two dead at the scene, while two others were later pronounced dead at Midland Memorial Hospital, Stout said. Ten other people were treated and released at the hospital, while five remained hospitalized Thursday night, one of them in critical condition.

Authorities don't yet know why the truck was on the tracks as the train arrived at the crossing, Stout said.

The National Transportation Safety board will initiate an investigation Friday that will include review of video from a camera on the train.

The gates and lights at the intersection were working at the time, and the train's two-member crew sounded the horn prior to impact, according to Tom Lange, a spokesman for Union Pacific Railroad. The train included more than 80 rail cars carrying double-stacked containers, he said.

The NTSB said it has not confirmed whether the crossing gates and signals were active at the time of the accident.

"Our thoughts and prayers are with family and friends of those affected," Lange said, adding that Union Pacific employees are on site and more are heading that way to investigate.

Lange said the train itself is operational and its crew was not injured. They are being offered counseling, he said.